The Role of Counter-Current Flow in Simultaneous Water and Gas Injection Processes

2014 ◽  
Author(s):  
Marjan Sherafati
Keyword(s):  
Current Flow ◽  
Gas Injection ◽  
Counter Current Flow ◽  
Counter Current

Counter-Current and Co-Current Gas Kicks in “Horizontal” Wells: Non-Newtonian Rheology Effects

2003 ◽  
Vol 125 (1) ◽  
pp. 51-60 ◽  
Author(s):  
H. Baca ◽  
D. E. Nikitopoulos ◽  
J. R. Smith ◽  
A. T. Bourgoyne
Keyword(s):  
Test Section ◽  
Gas Flow ◽  
Current Flow ◽  
Gas Injection ◽  
Horizontal Wells ◽  
Gas Flows ◽  
Counter Current Flow ◽  
Liquid Yield ◽  
Counter Current ◽  
Injection Rates

Results from experiments conducted in downward liquid-gas flows in inclined, eccentric annular pipes, with water-air and water-polymer-air mixtures as the working fluids, are presented. The gas was injected near the middle of the test-section length. This flow is directly relevant to what is found in down-grade portions of “horizontal” wells. Flow maps, in terms of liquid and gas superficial velocities, indicating the transitions between counter-current and co-current gas flows have been determined experimentally for four dip angles. The counter-current gas flow observed was always in the slug regime while the co-current one appeared as stratified. Counter-current flow fraction and void fraction measurements were carried out at various liquid superficial velocities and gas-injection rates and correlated to visual observations through a full-scale transparent test section. Results indicate that increase of the liquid yield point favors the development of counter current flow which is shown to occur at representative liquid superficial velocities and gas injection rates. Thus, counter-current flow can be easily generated at small downward dip angles, within the practical range of liquid superficial velocity for drilling operations, especially at low gas-injection rates.

Hydrodynamics of gas–liquid counter-current flow in solid foam packings

2005 ◽  
Vol 60 (22) ◽  
pp. 6422-6429 ◽  
Author(s):  
C.P. Stemmet ◽  
J.N. Jongmans ◽  
J. van der Schaaf ◽  
B.F.M. Kuster ◽  
J.C. Schouten
Keyword(s):  
Current Flow ◽  
Solid Foam ◽  
Counter Current Flow ◽  
Counter Current
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